Magnetic separator



Jan. 8 1924.

. 1,480,315 H. H. THOMPSON ET AL MAGNETIC SEPABATOR Filed Sept, 30. 1921Patented Jan. 8, 1924.

UNITED ATE AT NTo FICE.

HERBERT HUBAND 'rHoMPsoN, or. BIRMINGHAM, enn ALFRED EVAN DAVIES, or

' .TANWORTH-IN-ARDEN, ENGLAND. Y 1

: nnennrrc snreimron.

Application filed Septemher 30,1921; Serial No. 504,433.

To all whom it may concern.

Be it known that we, HERBERT HUBAND THOMPSON, of 137 Gravelly Hill,Birmingham, England, and ALFRED 'EvAN' DAvms,

of the Ingle, Ladbrook Park, -Tanworth in- Arden, Warwickshire, England,both British subjects, have invented certain newand useful Improvementsin and Relating to Magnetic Separators, of which the follow- Hi ing is aspecification.

as the magnetic reluctance of air is consider- It is well known that toobtain the best conditions for the working of magnets as far as possibletheir design should provide an iron path for the magnetic lines of forceable. In magnetic separators in which liquids or solids in a more orlessfinely divided state, are passed over magnets to abstract themagnetic materials from non- 30 magnetic or the more .mag netic from thefeebly magnetic, the necessity for the flow orconveyance of thematerials to be treated over the magnets has caused the design ofapparatus of this character to depart from the above principle.Accordingly the-magnet poles in this class of apparatus have beendirected in the air, so-to -speak, or have been covered with anon-magnetic surface over which the material to be treated has passed.

In some cases to enhance the magnetic field a second or further magnetpole or poles -may be placed above the air gaps through which thematerial passes, but this entails considerable expense in winding,working costs and repairs and frequently there are considerabledifficulties in the design of the separator which renders this coursesuitable metallic path for the lines of force emanating from the polepieces, which are separated from the armature pieces only by a narrowair gap, and greatly enhance the magnetic intensity at the magneticedges which are usually directed toward the materials to be treated.

The application of the invention to diflinvent-ion applied.

pieces for a tray or trough type of separator ferent types of separatorswill necessarily involve constructional differences in the arrangementfor supporting and locating the armature pieces, in correct position.Accordingly We have illustrated examples applied to, differentseparators in the appended drawings; i l I Figure 1 is a longitudinalsection of a tray or trough separator with one form of the Figure 2, isa cross section through Fig. 1. Figure 3, is a perspective view showingone method of making up the armature into a frame for placing in thetray or trough.

Figure 4, is a perspective view of another frame made up of armaturepieces the frame being shown inverted. V

Figure 5, is a sectional view showing a frame as at Figure 4 applied toa trough separator.

V Figure 6, is an enlarged detail view of a portion of Figure 5.

- In separating troughs for treating liquids,

treat dry materials, the magnets are arranged below the trough or trayto magnetize a number of bars or strips which are carried across thebottom of the trough from side to side. The magnetic'bars or stripsproject more or less from the nonmagnetic bottom of the trough tointerpose a number ofmagnetic edges in the path of the liquid ormaterials under treatment.

The presentinvention is not concerned with the construction of thetroughs or trays which may follow on any approved lines; these troughsare illustrated in Figures 1, 2, 5 and 6 to show the application of thepresent invention to them.

In these figures 0; represents the magnet bars or strips projecting fromthe false bot- "tom 6 ofthe trough. ,In Figures 1 and 2 the armature isin the form of'a single plate 100 of iron or steel 0 supported a'shortdistance above the bars a" by nonmagnetic ribs d, or by non-magneticpegs, pins or the like secured to the plate and resting on the bottom ofthe trough. This is a very simple form but a more satisfactoryarrangement is to build the armature pieces as bars e Figures 3 and 4,assembled into a frame with connecting members f and with non-magneticstrips 9 or pegs it so that the frame may be V l or in troughs or traysfor reciprocation to .1

placed .in a trough or the like with the bars 6 facing toward the bottomof the trough and suitably distanced therefrom. The frame may, ifdesired, be built up with nonmagnetic dividing portions i between thearmature bars 0.

As shown at-j, projecting iron or steel portions may be secured to thefaces of the armature bars 6 as Well as to the magnetic 7 bars a.

We claim- 1. In a magnetic separator, a troughfor arranged in the upperpart of the trough and suitably distanced from the said magneticsurfaces below them, and energized by the said magnets.

or tray type in which thematerial to be treatedis passed over ironmagnetic surfaces magnetized by magnets below the bottom of l thetrough, the combination with the magnet surfaces of the separator, ofarmature bars to alternate with bars in the tray or trough, andprojections on the armature bars and on the magnet bars of the troughsubstantially as described.

In testimony whereof we aflixour signatures.

HERBERT HUBAND THOMPSON.

ALFRED EVAN DAVIES.

2. In a magnetic separator 0f the trough

